Sheet-metal-pipe former and groover.



'No. 732,857. PATENTED JULY '7, 1903.. V M. HUNKER.

SHEET METAL PIPE FORMER AND GROOVER.

APPLIOATION TILED FEB. 11. 1902.

no menu... a sums-sum 1.

' No. 732,857. PATENTED JULY 7, 1903..

r I M. L. BUNKER.

SHEET METAL PIPE FORMER AND GROOVER.

APPLICATION FILED ran. 11, 1902.

e SHEETS-SHEET a.

N0 MODEL.

PATENTBD JULY 7, 1902...

6 SHEETS-SHEET 4.

M. L. HUNKER. SHEET METAL PIPE FORMER AND GROOVER.

APPLICATION FILED FEB. 11, 1902.

0 MODEL. 1

PATENTED JULY 7, 1903.

M. L; HUNKER.

SHEET METAL PIPE FORMER AND GROOVER,

APPLICATION FILED r123. n, 1902. V I a SHEETS SREET 5.

N0 MODEL.

IIS

PAT EDITED, JULYV, 19*03.

M. L. HU'NKBR. SHEETMETAL PIPE FORMER AND (moovsm APPLICATION FILED FEB.11, 1902. I NO MODEL 6 SHEETS-SHEET 6.

IO conjunction with each 3p ally stop the grooving TO THE PIPE MACHINEPI-IIA, PENNSYLVANIA.

UNITED STATES Patented duly "7; 1903.

PATENT OFF CE.

MESNE ASSIGNMENTS,

AND MANUFACTURING COMPANY, OF PHILADEL- SHEET-METAL- PIPE FORMER ANDGROOVER.

SPECIFICATION forming part of Letters Patezit N 0. 732,857, dated July7, 1 903. Application filed February 11, 1902. Serial No. 93,568. (Nomodel.)

To all whom, may concern:

. Be it known that I, MARTIN L. IIUNKER, a citizen of the United States,residing at Canton, in the county of Stark and State of Ohio, 5 haveinvented-anew and useful Sheet-Metal- .Pipe Former and Groover, of whichthe fllowing is a specification. My invention relates to pipe formingand grooving machines automatically operated in other in which the sheetmetal having been edged is formed and the turned edges looked around amandrel and thepipe thus formed is passed to another mandrel, where thelocked seam is I I grooved and the pipe is thus finished; and theobjects of. my improvements are to provide a mechanism for forming andedge-locking the pipe with greater facilit and speed than has Iheretofore been done, the forming and locking parts of which areadjustably adapted for various-sized'mandrels and pipes; to so form andedge-lock the pipe that the edges will not open or come apart before orduring I the process of grooving the seam; to remove I the formed andedge-locked and the grooved pipes from the respective mandrels andautomatically stop the machine when this is done,

and to groove the formed and edge-locked pipe by a return movement andautomatic mechanism and start the forming and edge-locking mechanismwhen this is done. I'attain these objects by the mechanism illustratedin the accompanying drawings, in which I Figure 1 is aplan view of theformer and part of the groover; Fig. 2, a plan view of the remainder ofthe groover; Fig. 3, a longitudinal vertical section of, the former;Fig. 4,

a longitudinal vertical section of the groover;

0 Fig. 5, a cross-section onthe line 5 5, Fig. 1;

Fig. 6, a cross-section showing the first operation in pipe-forming andthe complete operation in eaves-trough forming; Fig. 7, a cross-sectionshowing the second operation in pipe-forming; Fig. 8, a cross-sectionshowing the pipe-forming completed; Fig. 9, a crosssection showing" theturned edges locked; Fig. 10, a cross section showing the pipe ready forgrooving; Fig. 11., a cross-section 5b showing the pipe'grooved androunded; Fig.

12, perspective view of part of the grower,-

frame, showing the base-plate and frame of the grooving-carriage and thedurved trip'bar attached to the side of said carriage; and Fig. '13 aperspective view of the sheet-metal feed-rolls, showing the mode ofattachment and operation.

Similar numerals refer to similar throughout the drawings.

The frame of the pipe-former consists of the two similar members 1 and1, connected by the frame-rods 2. The plate-girder 3 is supported by thebrackets 4 between the frame members die line. Above the plate-girder 3is located the vertically-movable bed-plate 5, the end brackets 6 ofwhich are guided by the flanges 7 and 7 on the frame members. Connectingthe plategirder andthe bedplate are the toggle-levers 8, the respectivearms of which are pivoted to the girder below and to the plate above andthe common joints to the plate-actuating bar 9.

The blade-girders l0 and 11 are supported on. top of the frame membersby the similar brackets 12, which are ward and from the middle line.Connecting the blade-girders,respectively, and the frame are thetoggle-levers 13 and 14, the'r-espective bars of which are pivoted tothe outer parts of the frame members and to the bladegirders,respectively, and the common joints to the blade-actuating bars 15 and16, re-

spectively.

The forming-mandrel 17 is horizontally located in-t'he middle line andis supported at the rear end on the frame member 1 by the bracket 18there attached and is connected with andsupported by thegrooving-mandrel at the forward end. The fiorming-mandrel is round inits cross-section, except that the uppartsin the lower part in themidmovable sidew'ise toper side is flattened, forming the angles 20 and20 on either side, the angle 20*, projects the longitudinalbending-flange 21. V

On the bed-plate 5 are attached the series of similar wedge-shapedblocks 22, on which rests-the butting-plate 23, having inclined notches24 in its lower side corresponding with the wedge-blocks. Thebutting-plate is adjusted to various heights by the screw 25.

and on one side, near Resting on the bed-plate on either side of the ibutting-plate are the forming plates 26, which are flat, and the upperedges 29 are prefer-.

ably blunt or slightly rounded. The buttingplate 23 and theforming-plates 26, with their connecting and adjusting parts,togetherconstitute the forming-die 5.

On the inner side of the girder 10 is attached the forming blade 30,which has its upper side beveled to form the sharp projecting edge 3l,and on the inher sideof the girder 11 is attached the locking-blade 32,

. which has its projecting edge 33 preferably plate-actuating bar 9.

blunt or'slightly rounded. These blades are preferably made of'-angle-iron, and the at-' taching sides are provided with slots 34,through which are passed the attaching-bolts 35, thus giving a verticaladjustment. The lower sides of the respective blades are formedsubstantially flat and horizontal.

The cam-shaft 36 is mounted in the journal-bearings 37,'attached to theouter side of the frame member 1, and the pulley-shaft 38 is similarlymounted below the camshaft and carries the driving-pulley 39. Power istransmitted byzmeans of the cog-pinion 40on the pulley-shaft meshingwith the cog-wheel 41 on the cam-shaft. The cog-wheel is mounted on thecam-shaft with the ordinary pinclutch 42, which is thrown intoengagement by the rod 43 and automatically throws out at the end of onerevolution. i

r The three several cams 44, 45, and at are mounted on. the cam-shaft.The cam lel rotales in the frame 47, which is attached to the The cams45 and 46 rot-ate, respectively, in the frames 48 and49, the outer bars50 and 51 of which respective frames extend upward beyond the top of themachine-frame and also downward to a pivotal connection in the brackets52, attached to the frame member 1. The upper ends of the cam-frame bars50 and 51 are respectively attached to the blade-actuating bars 15 and16 by the compound knuckle-joints 53 and 54. The several cams aresimilarly formed and are so located one ahead of another on the 4 shaftthat when rotated they will throw the the machine being in its normalposition, as

respective cam frames successively away,

from the machine-frame and then successively toward it in the sameorder. Thus the plate toggle-levers 8 and the blade toggle-levers 13 and14, respectively, are operated successively 'by their respectiveactuating-bars 9, 15, and 16. I I

To form and edge-lock a sheet-metal pipe,

shown in Figs. 1, 3, and '5, and'the sheet metal 55 having been cut tothe proper length and width and the edges 56 and -5.7, respectively,flanged and turned 'back the sheet is fed into the machine by means ofthe feedrolls 58 and 59. The roll 58 is rotated by the sprocket-gear 60,which is driven from any convenientpower-shaft, and the roll 59 isrotated in the reverse direction by the cog-gears 60 on the ends or" theroll-shafts. Then the sheet enters the machine, it rests on the upperedges 29 of the forming-plates and is guided and held in properalinement by the guides 61 on either side, as shown in Fig. 5.

The pin-clutch is then thrown into engagement, (if automatically, ashereinafter described,) and by the rotation of the several cams the workis done as follows:

The butting and forming plates 23 and 26,

respectively, are first thrown upward by the toggle-levers 8, theforming-plates being ad justed to bend jthe sheet metal around the lowerhalf of the forming-mandrel, with the turned edgesextending upward andthe butting-plate being soadjusted as to hold the sheet metal in properposition by its pressure during the remainder of the operation, as shownin Fig. 6'.- The forming-blade 30 is then thrown inward by thetoggle-levers 13, forming one side of the sheetanetal over the mandrelwith an acute bend at the angle 20,

the blade being soadjusted vertically and in its lateral movement thatits sharp edge 31 engages the angle of the turned edge 56 and with thelower flat side holds the sheet metal immediatelyabove the flattened topof the mandrel and the turned edge just beyond the middle line, as shownin Fig. 7. 'ing-blade 32 is thenthrown inward by the toggle-levers 14,forming the other side of the sheet metal over the mandrel with an acutebend at the bending-flange 21, the blade being i so adjusted verticallyand in its lateral movement that its lower'flat side will carry theturned edge 57 immediately above and clearing beyond theturned edge 56,as shown in Fig. 8.

thrown away from the mandrel by the reverse action of their respectivetoggle-levers, and the turned edge 56 springs up and engages and lockswith the turned edge 57, as shown in Fig. 9,},after which thelocking-blade is thrown away from the mandrel to its normal position,when the machine stops, the camshaft having completed its onerevolution, which leaves the formed and edge-locked pipe 62 free to beremoved to the grooving-main drel 19. p

By the acute bends of the sheet metal over the angle 20 and the flange21 of the formingmandrel the engagement of the turned edges 56 and 57 isrendered secure, and they will not become unlocked in the further opera-I tions, and by the adjustments of the butting and forming plates thesaine can be adapted to the'various-sized mandrels and pipes, and. theycan also be used independently of the forming and locking blades for theforming of eaves-troughs, as shown by broken lines in Fig. 6.

The lock The butting and forming plates and the forming blade are thensuccessively llO track-bars 67. i The engage the track-bars only on thelowerand shafts 72 and 73 of t sprocketshaft.

ward end or the nected by members.

shaft 88, mounted on inner s1des,respectively, leavingthe upper andoutersides free between the end members for the travel of thegrooving-carriage base-plate68, the side projections 69 of which fitover and around the upper and outer sides of thetrack-bars,respectively.Thegroovingy carriage is moved forward and backward on 1 of which isattached to the the track-bars by asprocket-gear, the chain 70base-plate 68 and sprocket-wheels 71, the which are mounted on the therespective end frame On the forward sprocket-shaft 73 are also mountedthe cog-wheels '74 and 75, located on either side of the frame. Thesecog-wheels mesh, respectively, with the cogpinions id and 77, which aremounted on the reversing-shaft 78, located below the forward passesaround the forward sides of ing-shaft are mounted the ordinaryfrictionclutch pulleys?!) and 80, which are rotated Under thereversingshaft is located the cross-bar 81, which is movable endwise inbrackets, as.82, attached to the forwardv end respective ends of upwardthe clutchract'uating collars 85 tiv ythe cross-bar are turned and 86,respec- To the cross-bar is pivoted the forreversing-arm 87, the rearend of which is attached on thevertical rockthe rear side of the for-Ward end frameimember. ,Onthe vertical rock-shaft isalso attached ,thezrearward-extending arm 39, the rear end of which is conthe link withthe lower end'of the depending arm 91, the upper end of which isattached to the horizontal rock-shaft 92.

The horizontal rock-shaft is mounted along the side of thegroover-fraine, and by its oscil- 1 be thrown into 5o lation eitheroneof the friction-clutches can engagement or both of them thrown outbymeans of the reversing mech- I anism; The clutch-pulley 79 is thrown inby i depressing either of thelevers 93,

attached. to

I the horizontal rock-shaft, which is done by i theoperatorandwhichcauses the groovingt riageapproaches the forwardiend of theframe,

carriage to move forward. When the carthe, lowerside of the base-plate08 strikes the ,160 from the opet'atingleveis, and depresses the R riageto move rearward. 1 approaches the rear curved upper edge 94 of thetrip-plate 05,

which is attached to the by the curved arm 96 horizontal rock-shaft .onthe opposite side same. This depression throws out the clutchpulley 79and stops the machine. he clutchpulley 80 is thrown in byelevatingeither of the levers 03, which causes the grooving-oar- Whenthe carriage end of the frame, the

On either end of the revers-- lug-rollers 107 frame member. On the yokes83 and 84, engaging theframe 105 at the forward spectively, on therearand forward members of the frame, and is preferably of lessdiameter' than the forming-mandrel 17, to the forward end of which it isattached and furnishes support. The short rib 102 on the lower side ofthe formingmandrel and extends this surface forward beyond thesupporting roller 100.

In the middle line on the upper side of the grooving-mandrel is thegrooving-ridge 103, which rises slightly higher than the upper surfaceof the forming-mandrel, but tapers down to meet it at the juncture. Oneither side of the grooving-ridge are the spreadingribs 104, which neednot be any longer than the pipe to be grooved.

The grooving-carriage consists of the carriage-frame 105, attached tothe base-plate, on the forward side of which are attached the brackets106, in which are mounted the form- ,and 108, respectively below andabove the grooving-mandrel. On the rear side of the grooving-frame isadjustably mounted the grooving-wheel 109 in the attached bracket 110,and in front of the grooving-frame is mounted the forward stripper 111by the bracket 112.

The slide-bar 113 is horizontally locat ed in,

the middle line above the machine and'is supported at the rear end bythe bracket 18 and at the forward end by the arched grooving-framemember 65. Depending front the slide-bar is the sliding bracket 114, atthe lower end of which is attached the rear stripper 115. Attached tothe grooving-carriage end and to the sliding bracket at the rear end oneitherside are the connecting-rods 116, ing bracket and the,attachedrear stripper forward and backward with the movements of thegrooving-carriage.

"Attached to and extending to one side of the sliding bracket is thetrip-arm 117, to which is hinged the rearward-extending tripbar 118,which is held in normal position by the curved spring 119. When thegroovingcarriage and the connected sliding bracket are near the end oftheir rear movement, the trip-bar l1S strikes the upper end of the an.-gle-lever 120, which is pivotedto the frame member 1 and carries itforward,thus depressing the lower rear end, to which is attached thepin-clutch-actuating rod 43, and

thereby throws in the clutch and starts the forming-machine. When theblade-girder mandrel 19 rests on the" grooved rollers 100 and 10],mounted, re-

groovingmandrel at the 7 rear end is flushwith the lower surface of thewhich carry the slitl- Iio is thrown inward, the trip-post 1'21,attached thereto, strikes the trip-bar 118 and carries endof its onerevolution.

its rear end inward free from the upper end stripper pushes the pipeforward onto the.

grooving-mandrel, and the'grooving-carriage and connected parts areautomatically stopped when this is done by action of the trip-plate 95.When another piece of sheet metalhasbeen fed into'the forming-machine,

the operator starts :the grooving carriage rearward, and the lockedturned edges 56 and 57 are grooved by the wheel 109, which .completesthe seam 123, asshown in Fig. 11.

Before and during the grooving process to keep the turned edges fromcoming apart the spreading-ribs 104 serve to expand the upper part ofthe pipe and by tension hold the edges in close engagement, as shown inFig. 10. At the same time the upper forming-wheel 108 presses out theangular bends on either side of'the, upper part of the pipe, making thefinished pipe 124; a true circle in section. When this is-done, thegrooving-carriage and connected parts are automatically stopped byaction of the trip-head 98, and at the same time the formingmechanism'is started by action of the trip-bar 118. The next time thegrooving-carriage travels forward the finished pipe l24=is pushed offthe forward free end 125 of the grooving-mandrel by the forward stripper111.

In forming mandrels for kinds of pipe the bending-flange 21 can beomitted and the bending edge 20 substituted therefor, or the flatsurface can be omitted and an additional bending-flange similar to 21substituted for the bending-edge 20. I do not claim as myi'nvention theverticallyadjustable and specially -shaped formingblade and thelocking-blade, which are illustrated and described in connection with myforming-machine.

What I claim as my invention, and desire to secure by LettersPatent,is-- 1. In a sheet-metal-pipe former, a mandrel, a forming-die below anda forming-blade on one side and a locking-blade on thelother side abovesaid mandrel, a shaft, cams on said shaft, and bars and toggle-leversconnecting said cams-and said die and blades respectively, the cams andleversbeingarranged to operate the die and bladessuccessively toward andthen successively away from the mandrel.

2. In 'a sheet-metal-pipe former, a mandrel and a'die, the dieconsisting of two formingplates and a butting-plate therebetween, theforming-plates being adj u'stably spaced apart on either side of themandrel and the butt:

ing-plate being adjustable to andfrom the certain sizes and mandrel, andmeans for moving the die to and from the mandrel.

3. In a sheet-metal-pipe former, a mandreland adie, the die consistingof two formingplates adjustably spaced apart on either side of themandrel, and means for moving the die to and from the mandrel. Inasheet-metal-pipe former, a mandrel having its upper face flat, aforming-blade on one side and a locking-blade on the other sideoperating near and above said flat face, and means for successivelyactuating said forming and kicking blades inward and respectively aboveand beyond the middle line of said mandrel and then away therefrom.

5. In a sheet-metal-pipe former, a mandrel having a longitudinal oneside of its upper part, a forming-blade on one side and a locking-bladeon the other .side operating near and above said mandrel and'fiange, andmeans for successively actuating said forming and locking bladesinwardeand respectively above and beyond the middle line of said mandreland then away therefrom.

6. In a sheet-metal-pipe'former, a mandrel having its upper face flatand a longitudinalfiange projecting near one side of said fiat face, aforming-blade on one side and a locking-blade on the other sideoperating near and above said flat face andsaid flange, and

means for successively actuating said forming and locking blades inwardand respectively above and beyond the middle line of said mandrel and'then away therefrom.

7. In a sheet-metal-pipe former and groover, end-connected forming andgrooving mandrels, a stripper for the forming mandrel, agrooving-carriage for the groovingmandrel, the stripper and thecarriage'being connected,

and means for actuating the same.

' S. Inasheet-metal-pipeformeraudgroover,

end-connected forming and grooving mandrels, a slidebar loc'ated abovesaid mandrels, a sliding bracket depending from said slide-bar, astripperfor the grooving-inandrel on said bracket, a grooving-carriagefor the grooving-mandrel, the bracket and carriage beingconnected, andmeans for actuating the same.

9 In asheet-metal-pipeformerand groover, end-connected forming andgrooving- .mandrels, mechanism for forming and edge-locking a pipe onsaid forming-mandrel, a grooving-carriage and means for moving the samealong said grooving-mandrel, and a trip for starting said forming andlocking mechanism, automatically actuated by the movement of saidcarriage. l

In testimony whereof I have signed my name to this specification in'thepresence of two subscribing witnesses.

MARTIN L. IIUNKER.

flange prO ecting on' loo

